Catholic Encyclopedia: St. Fiacre: Biography of this Irish priest and hermit, patron saint of gardeners, d. 670.
Catholic Online: St. Fiacre: Biographical portrait of St. Fiacre, or Fiachra. Includes legendary material.
Fiacre: Illustrated profile of the saint, with links.
Fiacre, Saint: Short biography of the seventh-century anchorite. In the 1911 Encyclopædia Britannica.
Harvard Magazine: Saint Fiacre: Brief life of the gardener saint, by Richard Marius. Illustrated.
Saint Fiacre: The Patron Saint of Gardeners: Article by Leona Woodring Smith.